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Cellulose

, Volume 13, Issue 3, pp 205–211 | Cite as

Preparation and cholesteric mesophase properties of (Butyl-co-pentyl) propylcellulose

  • Tada-Aki YamagishiEmail author
  • Yoshiaki Nakamoto
  • Pierre Sixou
Special issue edited by Horii

Abstract

Butyl and pentyl ether derivatives of (2-hydroxypropyl) cellulose (HPC) and butyl/pentyl mixed ethers of HPC (BPPC) with different alkyl compositions were prepared in nonaqueous solution and their thermotropic cholesteric properties examined. The temperature dependence and the composition dependence of the optical pitch, nP, were then determined for all of the ether derivatives. The molecular conformation and chirality of BPPC appeared to be to be variably smooth with the side chain composition of the polymer. The response rate of cholesteric configurational change of the thermotropic mesophases arising from a temperature jump from 45  to 75 °C, was also determined. The transformation of the cholesteric mesophase formed by an equimolar ether derivative (BP-50) was faster than that of the cholesteric one formed by a single-alkyl (pentyl) ether derivative (BP-0). This seemed to be a general result reflecting a pseudo-copolymer effect of cellulose derivatives on the properties of their thermotropic cholesteric mesophases.

Keywords

Butyl/Pentyl ether derivatives Cholesteric configurational change HPC Optical pitch Thermotropic mesophases 

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Notes

Acknowledgments

T.-A.Y. thanks the French Ministry of Research (D.R.E.D.) for a postdoctoral fellowship.

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Tada-Aki Yamagishi
    • 1
    Email author
  • Yoshiaki Nakamoto
    • 1
  • Pierre Sixou
    • 2
  1. 1.Graduate School of Natural Science and TechnologyKanazawa UniversityKakuma-machiJapan
  2. 2.Laboratoire de Physique de la Matiere CondenseeU.R.A. 190 CNRSNice CedexFrance

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